Stone-dressing machine.



PATENTED 001-13, 1903,

'A. P. JONES; v I STONE DRESSING MACHINE.

APPLIGLTIOI FILED DIEU.-18, 1900.

' 4.SHEETS-SHEBT L' N0 MODEL.

Haleases:

PATENT-ED 00113; 19

N0L741,58Z.' AIJF. JONES.

STONE DRESSING MACHINE.

APPLICATION FILED D30. 18 1900.

i SHEETS-$312111 2.

no upon. 1

e l u $3 h u vfi No.741-,5 82. "IYATENTEDOGYT.13,1903. -A'.P.JONES.-

STONE, DRESSING MACHINE.

I APPLICATION FILED DEC. 18, 1900. no MODEL. I v mums-sung a.

m-ihqes sasz v 'PATENTBDDCT. 13, 1901a. A. JONES. v

STONE DRESSING MACHINE.

v .APPLIUATION FILED 111:0. 18. 1900. no 1011121,.

' fizz/anion S w w UNIT D STATES Patented October 13, 1903:

PATENT OFFICE.

ALBERT F. JONES, OESALEM, MASSACHUSETTS, ASSIGNOR TO AMERICAN GRANITE MACHINE COMPANY, OF SALEM, MAssAo UsErrsn OORPO- RATION OF MAINE.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of, Letters Patent N 0. 741,582, dated October 13, 1903. Application filed December is 1900. Serial No. 40,264. (l l'o model.)

To all whom it may concern.-

Be it known that l, ALBERT F. JONES, of Salem, county of Essex, State of Massachu-i setts,haveinventedanImprovementinStone} Dressing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like let ters on the drawings representing like parts.

This invention has for its object to con struct a stone-dressing machine especially.

adapted for roughing off the surface of-a stone in such manner that the edges of the stone will not be chipped ofi during the operation;

and the invention consists, essentially, in the form bearing the stone, and feeding mechanism for said platform constructed and ar-' ranged to advance the stone in a direction from the axis toward the middle of the cir-' cular stroke of the cutter; also, in the combination of a cutter, means for moving it back and forth in a circular path, a platform bearing the stone, means for adjusting the stone relative tov the cutter, whereby the axis of the circular stroke of the cutter will be disposed substantially midwaybetween the opposite edges of the surface of the'stone, and. means for moving the platform to advance; the stone against the cutter in a direction; from the axis toward themiddle of the cir-i cular stroke of the cutter; also, in other features, as will be hereinafter described.

' In carrying out this invention a revoluble' cutter is preferably employed, and said cutter is carried by an oscillating arm and is disposed relative thereto with its axis disposed slightly obliqueto the axis of the arm." The manner that it may be disposed at varying distances from the axis of the arm. The arm is oscillated to carry the cutter in a circular path, thereby giving it a circular stroke or sweep, and in practice I prefer to so construct I and arrange the parts that said arm travels As the cutter is ada complete semicircle.

'justed toward and from the axis of the oscilwill be varied. The stone to be cut is placed upon a platform and feeding mechanism is provided for moving said platform to advance the stone againstthe acting edge or portion of the cutter in a direction from the axis of the oscillating arm toward the middle of the circular stroke of the cutter. In adjusting the essential parts of the machine the stone will be set so that the axis of the oscillating arm will'be disposed substantially midway between the opposite edges of the surface of the stone and the'cutter will be adjusted on the arm at a proper distance from the axis of said arm, so that as 'the arm oscillates the acting'edge or portion of the cutter will traverse the stone from edge to edge, moving in a circular path, and consequently making a circular cut, and as the stone is advanced by the feeding mechanism in a direction from the axis of the oscillating arm toward the middle of the circular stroke of the cutter the edges of the stone willnot be chipped ofi by the cutter.

Figure 1 is a front elevation of a stonedressing machine embodying this invention. Fig. 2 shows a plan view of the stone-dressing machine shown in Fig. '1'. Fig. 3 isa side elevation of'a portion of the machine, showing the revoluble cutter and oscillating arm hearing it and-means for oscillating said arm. Fig. 4 is aside elevation of the mechanism for oscillating the-arm which bears. the revoluble cutter, Fig. 5 is aplan view of the platform upon which the stoneis placed. Fig. 6 is an end view of said platform. Fig. 7 is a sectional detail of the revoluble cutter. Fig. 8 is a detail of the supporting-plate for the bearing-box of the cutter-carrying spindle. Fig. 9 is a longitudinal section of the shaft bearing the oscillating-arm. Fig. 10 is a cross-sectional detail of the bearing-box. Fig. -11is a diagram showing the manner; of cutting the stone. Fig. 12 is a detail of the box containing bushing supporting the shaft to which the cutter-carrying arm is attached.

The cutter a is herein shown as a disk of ordinary construction, and said cutter is adapted to be supported so as to revolve the longitudinally adjustable 5 freely. The means herein shown for thus supporting the cutter a consists of a cylindrical spindle a, (see Fig. 7,) mounted to revolve freely in abox a and having a hole through it through which passes a bolt (1 by means of which the disk at is secured to the spindle. The bolt a has a nut (L at one end and a head a at the opposite end, and said head a is made more or less conical or tapering, and the bolt-hole through the center of the cutter a is also made to correspondingly taper to receive the head a. A washera is placed on the bolt a between the cutter a and the adjacent end of the spindle. When the nut a on the bolt is tightened, the cutter a will be securely held in position.

A roller-bearing is provided for resisting the end thrust of the cutter-carrying spindle a, which, as herein shown, consists of a set or group of rollers a contained in recesses in a ring or holder a which is disposed between two fiat rings a a contained in the box (1 and the rearmost end of the spindle a is cut away or reduced in diameter to receive said roller-bearing and also to form an abutting shoulder against which the ring of bears. The

' rearmost end of the bearing-box a is closed by an end piece or circular plate a which is bolted or otherwise secured to the box.

The bearing-box a is adjustably mounted on a plate b to turn on an axis at right angles to the axis of rotation of the cutter-carrying spindle a, and, as herein shown, said plate Z2 is made as a segment of a circle, (see Fig. 8,) having a downwardly-projecting ear b,which is adapted to be bolted or otherwise secured to an arm 0. The plate I) has a central stud b rising from it, which serves as a pivot for the bearing-box.

The bearing-box a has projecting from each side of it a thin web or flange (1 through which curved slots a are cut or formed, and bolts 00 pass through said curved slots ct and through any one of a series of holes 11 in the plate I) to thereby secure the bearing-box a to said plate I). The holes 79 in said plate b are arranged in a circle concentric to the pivot-stud. By loosening the bolts a the bearing-box a may be turned on the pivotstud as a center and adjusted more or less within the limitations of the slots 1 and it further adjustment is required said bolts 0. may be removed and replaced in other holes b in the plate I). The bolt b which passes through the ear I), also passes through a slot in the arm 0, (see Fig. 4,) thereby providing for adjustment of the plate b along on said arm 0 toward and from the axis of the arm.

A clamping-plate b is secured to the under horizontal shaft cl, which is supported by a suitable bushing d, contained in a box 61*, which is secured to the framework. The hub c of the cutter-carrying arm is splined onto said shaft cl, and said hub, has a counterbalance d for the arm secured to it. The cylindrical bushing d, containing said shaft d, is contained in the box d which is bolted or otherwise secured to the frame, and said box d has an elongated opening 61 in one side of it, through which a finger d projects, and said finger has a slot (1 at or near its outer end, through which a bolt 61 passes, which connects said finger rigidly to a lip (1 which is located at one side of the opening (i The bushing is thus rigidly held by the bolt (Z against longitudinal movement, yet by loosening said bolt said bushing may be adjusted longitudinally within the limitations of the slot (1 The lip d has a number of holes d any one of which may receive the bolt 61", thereby 'providing for greater longitudinal adjustment of the bushing than can be ob tained by the slot (Z As the bushing is thus adjusted longitudinally'the oscillating cu ttercarrying arm 0 is bodily moved with it and the cutter thereby moved toward and from the work.

The shaft (1 has secured to it a toothed wheel 6, which engages a pinion e, secured to a shaft 6 to which a toothed wheel a is secured, which engages a pinion a, secured to a shaft 6 hearing a fast pulley e and two loose pulleys 6 6 said loose pulleys being located one at each side of said fast pulley. Two belts e e are provided, one of which, as 6 will be a crossed belt, and means are provided for moving said belts simultaneously on the pulleys, so that either one of them may be moved into engagement with the fast pulley e, and as one of said belts is crossed said fast pulley will be rotated in one or the other direction and in turn through the gearing above described will oscillate the shaftd,bearingthecutter-carryingarm. The means herein shown for thus simultaneously moving the belts consists of a rod or bar f, having two belt-receiving eyes ff projecting laterally from it in opposite ways, and a swinging arm), to the extremity of which said rod or barfis attached, and means for swinging said armf The arm f is secured to the upper end of a vertical rod or barf", having its bearings in a bracket f on the frame, and an arm f is secured to the lower end of said rod or barf, which has a studf (see dotted lines, Fig. 4:) projecting from it. The stud f enters a cam-groove formed in the under side of a plate f secured to the lower end of an arm f pivoted at f and forming one arm or member of a bell-crank lever, the other arm or member, f, of said bell-crank lever projecting at substantially right angles to the arm f" and made long enough to enter the path of movement of two dogs f f, which are secured. to the shaft (1 and project therefrom radially in different upward stroke.

directions, secured to said shaft d, so as .to be independ ently moved around the shaft to occupy different relative positions. When the'fast pulley e is driven in one direction by the gearing aforesaid, the shaft (1 will be turned until one of said fingers strikes the arm f,

when the bell-crank lever will be moved on its pivot, and the cam-grooved plate f moving with said bell-crank lever will swing the arm f and thereby swing the arm f and move the rod or bar f and move the belts, and the fast pulley will then be caused to rotate in the opposite direction and will continue to thus rotate until the other dog on the shaft 01 strikes the arm f of the bellcrank lever.

g represents a platform, which will be made of any suitable construction adapted to receive the stone, and,as herein-shown, said platform has on its under side a number of supports 9, arranged in two parallel rows,

each support beinggrooved or recessed to rest upon and slide along on a pair of rods or bars 9 suitably supported on upright stands g erected on 'a base g the lower grooved or recessed ends of the supports 9 having their extremities turned under the guide rods or bars 9 so as to effectively hold the platform from rising, which it would be liable to do even with the stone on the platform, while the cutter is cutting the stone on'its The platform is movable to and fro by. means of a feed-screw 9 which passes through suitable threaded ears 9 (see dotted lines, Fig. 6) projecting from the under side of the platform. A toothed wheel 7; is secured to said feed screw 9 which engagesa'pinion 2' located beneath it and secured to a shaft to which a toothed wheel 13 is secured, and said toothed wheel i engages a pinion 41 secured to a shaft bearing a bevel-gear 1?, which is engaged and driven by a bevel-gear i secured tova shaft i It is designed that the feed-screw shall be rotated constantly while the machine is in operation. s

The platform g has erected upon it a number of stone-retaining devices consistingof an upright frame m, having a roller-supporting portion m adjustably connected to it. The upright stands are rigidly secured to the platform 9 or they may be adj ustably secured thereto, and as herein shown the stands at: one end of the platform are rigidly secured to the platform, while the stands at the opposite ends and along one side of the platform are adjustably secured thereto, occupying positions in guideways provided for them. Crossbars n are provided, (see Figs. 5 and 6,) which are adapted to be placed onthe plat form g, each having a number of jack-screws 'n, upon which the stone or other like crossbars may rest. By means of these cross-bars and jack-screws the stone may be elevated to any predetermined position. Thus, as itis herein desired to support the stone at 'a pre- The dogs f f are adjustably ameter of its circular stroke will be approxiniately equal to the width of the stone. It will be observed that by thus cutting the stone the edges will not be chipped off, as the cutter does not act with an outward thrust at the edge. 7

In Fig. 11 a diagram is shown which is in-.

tended to illustrate my method of cutting stone by the. machine forming the subjectmatter of thislapplication, wherebythe edges will not be chipped 01f. When the stone has been placed on the platform and properly positionedrelative to the cutter and the cutter properly adjusted on its arm, the stone will be constantly fed toward the cutter in a direction from the axis of the oscillating shaft 01 toward the middle of the cutter.

It is' obvious that many of the details of construction of the machine herein .shown maybe changed without departing from the spirit and scope of my invention. I claim- 1. Ina stone-dressing machine, the combinationjof a swinging arm, a cutter borne by it disposed with its cutting edge directed to-' ward the axis of the arm,'an oscillating shaft to which said arm is secured, means foroscillating said shaft, a platform bearing the stone and feeding mechanism for said platform constructed and arranged to'advance the stone against the cutter in a direction from the axis of the shaft toward the extremity of the arm, substantially as described.

2. In a stone-dressing machine, the combination of a swinging arm, a cutter borne by the circular stroke of it disposed with its cutting edge'directed toward the axis of the arm, a bearing-box for said cutter, means for adjusting said box on the arm to vary the angle of the cutter, an oscillating shaft to which said arm" is secured,

means for oscillating said shaft, a platform bearingthe stoneand feeding mechanism for said platform, constructed and arranged to advance the stone'against the cutter in a di rection from the axis of the shaft toward the extremity of the arm, substantially as described.

3. In a stone-dressing machine, the combi nation of a swinging arm, a cutter borne by it disposed with its cutting edge directed toward the axis of the arm, a bearing-box'for said cutter, means for adjusting said bearingbox toward and from the extremity of said too arm, an oscillating shaft to which said arm is secured, means for oscillating said shaft, a platform bearing the stone and feeding mechanism for said platform, constructed and arranged to advance the stone against the cutter in a direction from the axis of said shaft toward the extremity of the arm, substantially as described.

4. In a stone-dressing machine, the combination of a cutter, a bearing-box therefor, an arm carrying said bearing-box, means for adjusting said box on the arm to vary the angle of the cutter, means for adjusting said bearin g-box toward and from the extremity of said arm, an oscillating shaft to which said arm is secured, means for oscillating said shaft, a platform bearing the stone and feeding mechanism for said platform, constructed and arranged to advance the stone against the cutter in a direction from the axis of the shaft toward the extremity of the arm, substantially as described.

5. In a stone-dressing machine, the combination of acntter movable back and forth in a circular path, a support for holding it with its cutting edge directed toward the axis of its path of movement, means for moving said cutter, a platform bearing the stone, and feeding mechanism for moving said platform in a direction from the axis toward the middle of the circular stroke of the cutter, substantially as described.

6. In a stone-dressing machine, the combination of a cutter movable back and forth in a circular path, a support for holding it with its cutting edge directed toward the axis of its path of movement, means for moving said cutter, a platform bearing the stone, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the arc of movement of the cutter, and feeding mechanism for moving said platform in a direction from the axis toward the middle of the circular stroke of the cutter, substantially as described.

7. In a stone-dressing machine, the combination of a cutter movable back and forth in a circular path, a support for holding the cutter with its cutting edge directed toward the axis of its path of movement, means for moving the cutter, a platform bearing the stone, and feeding mechanism for said platform operating at the same time the cutter is moving, for moving said platform in a direction from the axis toward the middle of the circular stroke of the cutter, substantially as described.

8. In a stone-dressing machine, the combination of a swinging arm, a cutter borne by it disposed with its cutting edge directed toward the axis of the arm, an oscillating shaft to which said arm is secured, means for oscillating said shaft, a platform on which the stone is placed, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the arc of movement of the cutter, and feeding mechanism for moving said platform in a direction from the axis of said shaft toward the middle of the circular stroke of the cutter, substantially as described.

9. In a stone-dressing machine, the combination of a cutter, a bearing-box therefor, an arm carrying said bearing-box, means for adjusting said box on the arm to vary the angle of the cutter, an oscillating shaft to which said arm is secured, means for oscillating said shaft, a platform on which the stone is placed, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the arc of movement of the cutter, and feeding mechanism for moving said platform in adirection from the axis of said shaft toward the middle of the circular stroke of the cutter, substantially as described.

10. In a stone-dressing machine, the combination of a cutter, a bearing-box therefor, an arm carrying said bearing-box, means for adjusting said bearing-box toward and from the extremityof said arm, an oscillating shaft to which said arm is secured, means for oscillating said shaft, a platform on which the stone is placed, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the are of movement of the cutter, and feeding mechanism for moving said platform in a direction from the axis of said arm toward the middle of the circular stroke of the cutter, substantially as described.

11. In astonedressing machine, the combination of a cutter, a bearing-box therefor, an arm carrying said bearing-box, means for adjusting said box on the arm to vary the angle of the cutter, means for adjusting said bearing-box toward and from the extremity of said arm, an oscillating shaft to which said arm is secured, means for oscillating said shaft,-a platform on which the stone is placed, means for adjusting the stone relative to the cutter to bring its opposite edges Within the chord of the arc of movement of the cutter, and feeding mechanism for moving said platform in a direction from the axis of said arm toward the middle of the circular stroke of the cutter, substantially as described.

12. In a stone-dressing machine, the combination of a cuttercarrying arm bearing a cutter, an oscillating shaft to which said arm is secured, means for oscillating said shaft, means for adjusting said shaft longitudinally, a platform on which the stone is placed, means for adjusting the stone relative to the cut-ter to bring its opposite edges within the chord of the arc of movement of the cutter, and feeding mechanism for moving said platform in a direction from the axis of said shaft toward the middle of the circular stroke of the cutter, substantially as described.

13. In a stone-dressing mac'hine,the combination of a cutter-carrying arm bearing a cutter, an oscillating shaft to which said arm is secured, a bushing in which said shaft is free 'having a lip to which said projection is secured, substantially as described.

14. In astone-dressing machine, the combination of a swinging cutter-carrying arm, a cutter borne by it disposed with'its cutting edge directed toward the axis of the arm, means for swinging said arm to move the cutter in a circular path, a platform bearing the stone, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the arc of movement of the cutter, and means for movingthe platform in a direction from the axis on which the cutter-carrying arm swings toward the middle of the circular stroke of the cutter, substantially as described.

7 15. In a stone-dressing machine, the combination of a swinging arm, a cutter borne by it disposed with its cutting edge directed toi I ward the axis of the arm, an oscillating shaft ways on which said platform moves, means for holding said platform in position on said guideways yet permitting it to be moved along, and means for moving said platform on said guideways, substantially as described.

16. .In a stone-dressing machine, the combination of a swinging arm, a cutter borne by it disposed with its cutting edge directed toward the axis of the arm, an oscillating shaft to which said arm is secured, means for os-' cillating said shaft to thereby swing the cutter-carrying arm in a vertical plane, a platform bearing the stone, stone-retaining'devices thereon, guideways onwhich said platform moves, means for holding said platform in position on said guideways yet permitting it to be moved along, and means for moving said platform on said guide'ways,substantially as described.

1 7. In a stone-dressing machine, the combination of a swinging arm, a cutter borne by it, disposed with its cutting edge toward the axis of the arm, a platform bearing the stone,

- ston e-retainin g devices thereon,guideways on which said platform moves, means for holding'said platform in position on said guideways yet permitting it to be movedalong, means for adjusting the stone relative to the cutter to bring its opposite edges within the chord of the arc of movement of the cutter, and means for moving the platform in a direction from the axis toward the middle of the circular stroke of the cutter, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT F. JONES.

Witnesses:

B. J. NOYES, H. B. DAVIS. 

